|Title||Investigating Time Lags In AGN In The Absence Of Reflection|
|Author||Dr Abderahmen Zoghbi|
|Description||Relativistic reverberation has been observed in several AGN, where delays comparable to the light crossing time very close to the black hole are seen between the Fe K line and the continuum. If this interpretation is correct, objects with no reflection should show no relativistic reverberation. Continuum lags however, are expected to be present regardless of reflection. The latter have been attributed to either Comptonization, propagating fluctuations or scattering. Here, we request a 120 ks observation of PG 1448+273 that shows no signs of reflection to directly test these predictions and constrain the continuum lags. The absence of reflection will allow us to isolate the continuum lags and understand their origin, providing unprecedented constraints on the X-ray source and the reflector.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2018-03-29T22:00:00Z, 078143, 17.56_20190403_1200. https://doi.org/10.5270/esa-o6um770|